Photocurable inks and primers for automotive interior applications and glass articles comprising same

Abstract

An ultraviolet ink composition includes from 25 wt % to 50 wt % of a pigment dispersion, from greater than 0 wt % to 10 wt % of a photoinitiator package; from 10 wt % to 42 wt % of a reactive diluent; from 10 wt % to 20 wt % of a multifunctional monomer; and from 0 wt % to 25 wt % of a difunctional monomer. An ink primer includes from 2 wt % to 10 wt % of an adhesion promoter configured to bond to glass and from 90 wt % to 98 wt % of a solvent configured to promote bonding of the adhesion promoter to the glass. Another ink primer includes from 2 wt % to 10 wt % of an adhesion promoter configured to bond to glass, from greater than 0 wt % to 10 wt % of a photoinitiator package; and from 30 wt % to 45 wt % of a monofunctional monomer.

The invention claimed is: 
     
         1 . A glass article comprising:
 a glass substrate having a first major surface and a second major surface, the second major surface being opposite the first major surface; and   an opaque layer disposed on the second major surface, the opaque layer comprising a cured ink comprising at least 11 wt % of a pigment, wherein:
 the pigment comprises a carbon black pigment with an average particle size less than or equal to 200 nm, 
 the opaque layer comprises cross-linked vinyl and acrylate groups, 
 the opaque layer is formed from an ink composition that, prior to being cured, is resin free and (2,4,6-trimethylbenzoyl)diphenyl phosphine oxide free, 
 the opaque layer comprises a thickness less than or equal to 15 μm and an optical density greater than or equal to 5.0, and 
 when viewed from the first major surface and illuminated at a 10° angle by a D65 illuminant, an area of the glass article covered by the opaque layer exhibits:
 a CIELAB SCI L* value less than or equal to 30, 
 a CIELAB SCI a* value greater than or equal to −0.05 and less than or equal to 0.15, and 
 a CIELAB SCI b* value greater than or equal to −0.3 and less than or equal to −0.1, and 
 
 the opaque layer exhibits:
 a pencil hardness greater than or equal to 3H, when measured according to ASTM 3363, and 
 an adhesion to the glass substrate greater than or equal to 4B, after being subjected to a temperature of 85° C. at 95% relative humidity for a period of at least 500 hours, when tested according to ASTM 3359. 
 
   
     
     
         2 . The glass article of  claim 1 , wherein the CIELAB SCI L* value is less than or equal to 28. 
     
     
         3 . The glass article of  claim 1 , wherein the CIELAB SCI L* value is less than or equal to 25. 
     
     
         4 . The glass article of  claim 1 , when viewed from the first major surface and illuminated at a 10° angle by a D65 illuminant, an area of the glass article covered by the opaque layer exhibits a CIELAB SCE L* value that is less than or equal to 1. 
     
     
         5 . The glass article of  claim 1 , when viewed from the first major surface and illuminated at a 10° angle by a D65 illuminant, an area of the glass article covered by the opaque layer exhibits a CIELAB SCE a* value that is greater than or equal to −0.1 and less than or equal to 0.1. 
     
     
         6 . The glass article of  claim 1 , when viewed from the first major surface and illuminated at a 10° angle by a D65 illuminant, an area of the glass article covered by the opaque layer exhibits a CIELAB SCE b* value that is greater than or equal to −0.1 and less than or equal to 0.1. 
     
     
         7 . The glass article of  claim 1 , wherein the opaque layer comprises sub-layers that are in direct contact with one another. 
     
     
         8 . The glass article of  claim 7 , wherein the sub-layers are formed of different materials. 
     
     
         9 . The glass article of  claim 1 , wherein the opaque layer comprises an adhesion promoter that is bonded to the glass substrate and polymerized with an ink layer of the adhesion promoter. 
     
     
         10 . The glass article of  claim 9 , wherein the adhesion promoter comprises an organofunctional silane. 
     
     
         11 . The glass article of  claim 9 , wherein the opaque layer exhibits an adhesion to the glass substrate greater than or equal to 4B, after 500 1 hour cycles of being held at a temperature of −40° C. for 0.5 hours and a temperature of 95° C. for 0.5 hours, when tested according to ASTM 3359. 
     
     
         12 . The glass article of  claim 11 , wherein the glass article exhibits a maximum ΔE value (both SCI and SCE), measured both prior to and after the 500 1 hour cycles, that is less than 2.0. 
     
     
         13 . The glass article of  claim 1 , wherein the average particle size is less than or equal to 150 nm. 
     
     
         14 . The glass article of  claim 1 , wherein the average particle size less than or equal to 100 nm. 
     
     
         15 . The glass article of  claim 1 , wherein the glass substrate comprises at least one of soda lime glass, aluminosilicate glass, borosilicate glass, boroaluminosilicate glass, alkali-containing aluminosilicate glass, and alkali-containing borosilicate glass. 
     
     
         16 . The glass article of  claim 1 , wherein the opaque layer exhibits a cured surface tension greater than 36 dynes/cm. 
     
     
         17 . The glass article of  claim 1 , wherein the opaque layer exhibits an electrical resistivity greater than or equal to 1×10 9  Ω/sq, when measured according to ASTM D-257 at 100V DC. 
     
     
         18 . The glass article of  claim 1 , wherein the cured ink comprises less than 20 wt % of the pigment. 
     
     
         19 . The glass article of  claim 18 , wherein the cured ink comprises greater than or equal to 13 wt % of the pigment. 
     
     
         20 . The glass article of  claim 1 , wherein the thickness is greater than or equal to 10 μm and less than or equal to 12 μm.